Francis



@nite-h 11mm @anni @ffice FRNIS O. GIM-IRK, OF BENTONS PORT, IOWA,ASSIGNOR TO HIMSELF ANI) JOHN E. REININGHUS, OF THE SAME. PLACE.

Letters Patent No. 71,276, dated November 26,1867.

IMPROVEMENT IN STAVE-MAGIIINES.

TO ALL WI-IOM IT MAY CONCERN: l v

Be it `known that I, FRANCIS O. CLARK, of Bcntons Port, in the county ofVan Buren, and State of Iowa, have invented a new and improved Machinefor Sewing and Jointing Staves and I do hereby declare that thefollowing is a full7 clear, and exact description tl1ereoi',refcrencebeing had to the accompanying drawings, making a part of thisspecification, in which- FigureI 1 is a top view.' ot" the improvedmachine.

Figure 2 is a longitudinal section, taken through fig. 1, in thevertical plane indicated by red line :e z.

Figure Slis'a transverse section through figs. 1 and 2, taken in thevertical plane indicated by red line y y.

Figure 4 is a top view, showing the two inclined jointingsaws and theirladjustable frames.

Similar letters of reference indicate corresponding parts inthe severaliigures,

This invention is designed for sawing barrel-staves from bloclrsof theproper curved form, and then jointing such stavcs so that they will tneatly together when hooped in the form of a barrel.

The nature of the first part'of my invention consists in combining acircular saw, of proper shape, with a circularly movable bed, in suchmanner that staves can he conveniently, and with great facility, sawedfromv blocks of wood conned upon said bed, as will'be hereinafterexplained. v 'A The nature ofthe second part 0E my invention consists inthe employment of two inclined circular saws upon adjustable frames, incombination with a rectilinear reciprocating carriage, which is providedwith means which the curved staves can be firmly held in about theposition they would assume when hooped in'- barrelw form, and while thusheld presented to the inclined saws and their edges properly jointed, aswill be hereinafter described. i Y

" To enable others skilled in the art to understand-my invention, I willdescribe its construction and operation.

In the accompanying drawings, A represents the table or frame upon whichthe improved devices for cutting. staves from blocks and jointing themare applied. Transversely across the top B of the table, a curved grooveor channelLa, is made, the edges of which are undercut, so as' to form adoveetail groove for receiving the cir cularly movable slide or carriageC, and keeping this slide down in place. To the ends of the slide C,headpieces lfb are secured, between which the blocks from which stavesare cut are coniined-by means of spurs and clamping-scrcws or othersuitable means. The stares are sawedrfrom the blocks confined upon saidslide by means of a circular saw, D, which is applied to an arbor., c,that has its bearings in 'journal-boxes applied on top ofthe frame A,beneath the bed B, as shown in tig. 2. Upon the arbor c a pulley, c, iskeyed, over which a belt passes, that transmits motion to the saw-arborfrom a pulley or drum upon the main driving-shaft E. It willbe seen, byreference to the drawings, figs. 1 and 2, that thc circular saw' D is(lished, so that its concave face is presented next the work, Jtherebycausing it to conform tov the curvature of the staves 'and block fromwhich .the staves are sawed. The curve which is given to the stavessawed from the blocks by saw I) is considel erably less than the curveor bulge which tbtsegstaves are made to take when hooped in barrels. Thestaves which have been sawed fromthe blocks vhare removed to thetransversely' sliding carriage F, and jointed byv means of thc twoinclined saws G G. The carriage F is slotted longitudinally, so, as toreceive through it the two saws, and to allow of their being adjusted indiicrent planes, and set to run at diierent distances apart.- Ncar thefront end of theA carriage F is a standarmd, to which a right-angularclamping-lever, cl, is pivoted, the object of lwhich is to bend and holddown one end of a'stavc while it is being jointed bythe saws G G.' Theother end of thestave is held down by means of the clamp c, which isacted upon by the set-screw c. The washer on this screw is madeadjustable so as to admit and confine the ends of stavs which vary inthickness; and this clamp entire is inside adjustable on the table so asyto accommodate staves of different lengths. At anv intermediate pointbetween the two elampsabo've mentioned, a block, f, is applied, and heldin place by means of studs entering holes made through the carriage F,as shown. in fig. 3. This block is made removable as well as adjustable;-removabie, in order to substitute .higher blocks for loirgstaves;adjustable, so as to bring it 's centrally between the clamps for short"staves. By means of said clamps and bulge 'blocks the stave-s can besecured, one at a time, upon the carriage F, and held in the bent formthey are required to takewhen" hooped together in barrels. The stavesare thus held while the carriage is moved forward, and the saws Gr dresstheir edges, or, what is technically termed, joint them. The saws Gr Gare required to'be held in planes radiating from a centre, which wouldcoincide with the centre ofthe barrel which it is desired to make. Thesesaws are fast upon the ends of arbors gg, which have their bearings inrectangular frames h h, th'at incline in opposite directions, as shownin'igs. 2I and al. The saw-frames are supported in guide-frames jj, so`that the former can be adjusted in a direction with the length of thesawshafts by means of lever'c; and these guidei frames are supportedupon the table-frame A. by means of trnnnions zz', so that the saw andguide-frames can be-raised or depressed at Vtheir outer ends, and thesaws adjusted and set to work at any given angle with respect to thetable-top. The lever le, by means of which the saws and their frames L Lare adjusted nearer together or set further apart, according to thewidth of stave tobe jointed, is connected to the saw'frames by means ofjointed links /c 7c', acting like toggle-levers. These links are of abell-crank form, or nearly so, in order thattheir angle or corner may benearly as high as the pivot by which they are connected to the straightmoving inclined bearings or frames 7L lr, and thus produce a thrust uponsaid frames nearlyin a line with the direction in which the bearings orframes move. `The outer ends ofthe guide-frames jj are raised ordepressed by means of levers Z, which pass through slotted hangers m, atthe front of the table A, and are held fast by means of' pins passedthrough said hangers. Lever 1c is similarly secured when the saws areadjustedat the proper distance apart. The arbors gg are rotated by meansof belts passing over pulleys, which are on these arbors, and on themain driving-shaft E. i

It will be seen from the above description that I first saw the stavesfrom blocks or bolts, of a form approaching that which they are requiredto take when hooped 'together'. I then bend and clamp the staves'orstave-blanks upon a sliding carriage, and run them between two properlyinclined saws, which give therequired bevel or joint to the edges of thestares, so that when put together they will tit snugly and tightly. Thetwo operationsl are conducted upon the same table, and by means of' sawswhich are rotpted by a single driving shaft, with belts for transmittingthe motion, as above described.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-

1. The curved carriage C fitted into a channel'of the table B in therelation to a dish-saw, and flush with the top ofthe table, the saidcarriage and table constituting parts oi' a stave-sawing machine, andthe carriage being provided with head-blocks, a clamping device, and thetable with gauges, all substantially in the manner and for the purposeherein described.

2. The table B of a stave-sawing machine, with a channel of curved formhorizontally, and of" a dove-tail form vertically, out down into it soas to form a depressed bed for the carriage C, and also guides therefor,substantially as and for the purpose set forth. l

3. .Tointing-saws, mounted on inclined arbors, which are supported uponstraight moving-endwise adjust able bearings 7i li, which are operatedby the devices `shown, or the equivalents thereof, substantially asdescribed. i

4. The jointing-saws, mounted upon inclined arbors, which are supportedupon straight moving-endwise adjustable bearings it It, which areoperated by the devices shown, or their equivalents, in combination withthe vertically vibrating frames j y', operated by the devices shown, ortheir equivalents, substantially as described. l 5. The combination of'the straight moving-endwisc adjustable bearings or frames t t, carryinginclined arbors with jointing-saws upon them, the toggle-joint, formedof bent links k 7c and the lever 7c, for the purposof of adjusting thesaws at any desired distance apart, without changing their angle of'inclination, substantially `as described.

6. Providing for both adjusting the saws farther apart without changingtheir angle of inclination, and for changing the angle of inclination,when desired, in the one machine, by the means substantiallyasdescribed.

7. rlhe adjustable clamp e e', for accommodating one of the ends oi'different thicknesses of staves, in combination with the lever-clamp d,substantially as described. f`"`"- 8. Making the bilge-block bothremovable and adjustable bet'hzeen the clamps d e. for the purpose ofbilging diiierent lengths of staves, substantially as' described.

' FRANCIS O. CLARK.,

Witnesses:

Erw. Scnsnnn, Een. F.' BROWN.

